"""数值运算"""
1 + 2
1 - 2
1 * 2
1 / 2
10 // 3  # 整除
5 ** 3  # 乘方
10 % 3  # 取余

# 逻辑运算: True  False
True and False
False and False
True and True

True or True
True or False
False or False

not True

# 判断运算符
1 == 1
8.0 == 8
'8' == 8
8 != 8
4 < 5
4 <= 5
4 > 5
4 >= 5

"""运算符的优先级
**
*   /   //  %
+   -
==  >   >=  <   <=  !=
not
and
or
"""
(4 + 2) * 5